Light signal transmitting device and signal processing device

Abstract

In a device of the present invention for allowing signal light to enter a light guide body using an optical fiber, a light guide body, which is constituted by dispersing particles for scattering the signal light in an optical medium, is selected as a light guide path which requires an area where a light diffusing function is performed just after incidence of the signal light. An optical connecting material intervenes between one end of the optical fiber from which the signal light is output and opposed one end surface of a particle dispersing light guide body and a desired diffusing function is obtained.

1. A light signal transmitting device for allowing signal light entering from one end of at least one optical fiber on an incident side to enter a light guide body, and emitting the signal light towards a plurality of output nodes and including a light transmitting connecting material for optically connecting the optical fiber with one end surface of the light guide body, wherein the light guide body is constituted so that particles for scattering the signal light are dispersed in an optical medium; wherein the connecting material is provided at least in an area including a partial side surface of the optical fiber, a gap between the optical fiber and the light guide body, and a portion of the light guide body. 
   
   
     2. A light signal transmitting device according to  claim 1 , wherein a refractive index of the connecting material has a value within a range of 1.45 to 1.57. 
   
   
     3. A light signal transmitting device according to  claim 1 , wherein the connecting material is provided at least in an area including a partial side surface of the optical fiber and the entire light guide body, and the gap is sealed by the connecting material. 
   
   
     4. A light signal transmitting device according to  claim 1 , wherein an average particle diameter of the particles is not less than a wavelength of the signal light transmitted by the light guide body. 
   
   
     5. A light signal transmitting device according to  claim 1 , wherein the optical fiber is a plastic optical fiber. 
   
   
     6. A light signal transmitting device according to  claim 1 , wherein the light guide body has a rectangular shape. 
   
   
     7. A light signal transmitting device according to  claim 1 , wherein a plurality of optical fibers are provided. 
   
   
     8. A light signal transmitting device according to  claim 1 , wherein the other end of the light guide body has a reflecting unit. 
   
   
     9. A light signal transmitting device according to  claim 8 , further comprising an optical fiber connected with the other end of the light guide body. 
   
   
     10. A signal processing device, comprising:
 a light signal transmitting device for allowing signal light entering from one end of at least one optical fiber on an incident side to enter a light guide body, and emitting the signal light towards a plurality of output nodes and including a light transmitting connecting material for optically connecting the optical fiber with one end surface of the light guide body, wherein the light guide body is constituted so that particles for scattering the signal light are dispersed in an optical medium; 
 a light emitting element for emitting a light signal according to an electric signal to an end of an optical fiber or a light receiving element for converting the light signal received from the other end of the optical fiber into an electric signal; and 
 an electric circuit for processing the electric signal; wherein the connecting material is provided at least in an area including a partial side surface of the optical fiber, a gap between the optical fiber and the light guide body, and a portion of the light guide body. 
 
   
   
     11. A signal processing device according to  claim 10 , wherein a refractive index of the connecting material has a value within a range of 1.45 to 1.57. 
   
   
     12. A signal processing device according to  claim 10 , wherein the connecting material is provided at least in an area including a partial side surface of the optical fiber and the entire light guide body, and the gap is sealed by the connecting material. 
   
   
     13. A signal processing device according to  claim 12 , wherein an average particle diameter of the particles is not less than a wavelength of the signal light transmitted by the light guide body. 
   
   
     14. A signal processing device according to  claim 13 , wherein the optical fiber is a plastic optical fiber. 
   
   
     15. A signal processing device according to  claim 10 , wherein the light guide body has a rectangular shape. 
   
   
     16. A signal processing device according to  claim 15 , wherein a plurality of optical fibers are provided. 
   
   
     17. A signal processing device according to  claim 10 , wherein the other end of the light guide body has a reflecting unit. 
   
   
     18. A signal processing device according to  claim 17 , further comprising an optical fiber connected with the other end of the light guide body.